1. AO Research Institute Davos, Davos, Switzerland.
2. IZKF Research Group Tissue Regeneration in Musculoskeletal Diseases, University Clinics Wuerzburg, Wuerzburg, Germany.
3. Bernhard-Heine-Center for Locomotion Research, University of Wuerzburg, Wuerzburg, Germany.
4. Department of Orthopaedic Surgery, König-Ludwig-Haus, University of Wuerzburg, Wuerzburg, Germany.